ASTM A453 Grade 660 Bolts
ASTM A453 Covers Specification for High temperature Bolting with expansion co-efficient comparable to Austenitic Stainless Steel. One of the commonly used is grade 660 Bolts. We produce Stud Bolts, Hex Bolts ,Expansion bolts,threaded rods etc as per A453 Grade 660 in Class A/B/C/D , intended for Special Engineering Applications . TorqBolt Manufactures , Stocks & Supply these A453 Grade 660 A/B/C/D StudBolts, Stainless Steel Bolting in various sizes & Coatings.
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Grades & Classes ( Click on the individual Class to navigate )
| Grade 660 | Class A | Class B | Class C | Class D |
|---|---|---|---|---|
| Grade 651 | Class A | Class B | ||
| Grade 662 | Class A | Class B | ||
| Grade 665 | Class A | Class B | ||
| Grade 668 | Class A | Class B |
Material Chemical Composition Requirements
| ELEMENT | Grade 660 | Grade 651 | Grade 662 | Grade 665 | Grade 668 |
|---|---|---|---|---|---|
| % | % | % | % | % | |
| Carbon | 0.08 max | 0.28-0.35 | 0.08 max | 0.08 max | 0.08 max |
| Manganese | 2.00 max | 0.75-1.5 | 0.40-1.00 | 1.25-2.00 | 2.00 max |
| Phosphorus, max | 0.040 max | 0.040 max | 0.040 max | 0.040 max | 0.040 max |
| Sulfur, max | 0.030 max | 0.030 max | 0.030 max | 0.030 max | 0.030 max |
| Silicon | 1.00 max | 0.30-0.80 | 0.40-1.00 | 0.1-0.80 | 1.00 max |
| Nickel | 24.0-27.0 | 8.0-11.0 | 24.0-28.0 | 24.0-28.0 | 17.5-21.5 |
| Chromium | 13.5-16.0 | 18.0-21.0 | 12.0-15.0 | 12.0-15.0 | 13.5-16.0 |
| Molybdenum | 1.00-1.50 | 1.00-1.75 | 2.0-3.50 | 1.25-2.25 | 1.50 max |
| Tungsten | ... | 1.00-1.75 | ... | ... | ... |
| Titanium | 1.9-2.35 | 0.1-0.35 | 1.80-2.10 | 2.70-3.30 | 2.20-2.80 |
| Columbium * | ... | 0.25-0.6 | ... | ... | ... |
| Aluminum | 0.35 max | 0.35 max | 0.25 max | 0.50 max | |
| Vanadium | 0.10-0.50 | ... | ... | 0.50 max | |
| Boron | 0.001-0.010 | 0.001-0.010 | 0.01-0.07 | 0.001-0.010 | |
| Copper | 0.50 max | 0.50 max | 0.25 max | ... |
Mechanical Properties Requirements
| Size | Class | Tensile, Mpa | Yield, Mpa | Elong. %, min | RA %, min |
|---|---|---|---|---|---|
| Grade 660 | A, B , & C | 895 min | 585 min | 15 | 18 |
| D | 895 min | 725 min | 15 | 18 | |
| Grade 651 | A | 690 min | 485 min | 18 | 35 |
| 415 min | |||||
| B | 655 min | 415 min | 18 | 35 | |
| 345 min | |||||
| Grade 662 | A | 895 min | 585 min | 15 | 18 |
| B | 860 min | 550 min | 15 | 18 | |
| Grade 665 | A | 1170 min | 830 min | 12 | 15 |
| B | 1070 min | 830 min | 12 | 15 | |
| Grade 665 | A & B | 895 min | 858 min | 15 | 18 |
Heat Treatment Requirements
| Grade | Class | Solutiona Treatment | Hardening Treatment |
|---|---|---|---|
| 660 | A | 1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench | 1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool |
| B | 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench | 1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool | |
| C | 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and oil quench | 1425 +/- 25 °F [775 +/- 14 °C] hold 16h, air cool followed by 1200 +/- 25 °F [650 +/- 14 °C], hold 16h, air cool | |
| D | 1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench OR | 1325 +/- 25 °F [720 +/- 14 °C] hold 16h, air cool followed by 1200 +/- 25 °F [650 +/- 14 °C], hold 16h, air cool if neccessary to achieve properties, second age : 1200 +/- 25 °F [650 +/- 14 °C] hold 16h, air cool |
|
| 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench | |||
| 651 | A | hot-cold worked at 1200 °F[650] min with 15% min reduction in cross sectional area, stress-relief anneal at 1200 °F [650 °C] min or 4h, min | |
| B | hot-cold worked at 1200 °F[650] min with 15% min reduction in cross sectional area, stress-relief anneal at 1350 °F [730 °C] min or 4h, min | ||
| 662 | A | 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench | 1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool |
| B | 1950 +/- 25 °F [1065 +/-14 °C], hold 2 h, min and liquid quench | 1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool | |
| 665 | A | 1800 +/- 25 °F [980 +/-14 °C], hold 3 h, min and liquid quench | 1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool |
| B | 2000 +/- 25 °F [1095 +/-14 °C], hold 3 h, min and liquid quench | 1350 to 1400 °F [730 to 760 °C], hold 20h, furnace cool to 1200 +/- 25 °F [650 +/- 14 °C], hold 20h, air cool | |
| 668 | A | 1650 +/- 25 °F [900 +/-14 °C], hold 2 h, min and liquid quench | 1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool |
| B | 1800 +/- 25 °F [980 +/-14 °C], hold 1 h, min and liquid quench | 1325 +/- 25 °F [720 +/- 14 °C] 16h, air cool |
Stree Rupture Requirements
| Grade | Class | Test Temperature | Stress, Min | Time to Rupture | Elongation | |
|---|---|---|---|---|---|---|
| Deg F [ Deg C ] | Ksi | Mpa | Min, h* | Min % | ||
| 660 | A, B & C | 1200 [650] | 56 | 385 | 100 | 5 |
| 651 | A & B | 1200 [650] | 40 | 275 | 100 | 5 |
| 662 | A & B | 1200 [650] | 55 | 380 | 100 | 5 |
| 665 | A | 1200 [650] | 75 | 515 | 100 | 3 |
| B | 1200 [650] | 70 | 485 | 100 | 5 | |